For Toro 120-3335 Synchronous Belt w/ Pix 1203335 & Genuine 161-4815 Idler Pulley
📑 Table of Contents
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📌 Item Specifics
- Brand: Toro / Pix
- Main Part Number: 120-3335
- Pix Replacement Number: 1203335 / P-1203335
- Included Components: Synchronous Belt + Idler Pulley
- Idler Pulley Part Number: 161-4815
- Superseded Part Number: 131-4529
- Application: TimeMaster & TurfMaster Series
- OEM Usage Start: 2012–Present
📖 Product Description
This kit includes a Toro 120-3335 synchronous belt manufactured by Pix (P-1203335 equivalent) along with two genuine Toro 161-4815 idler pulleys.
Toro introduced this synchronized blade drive system in 2012 and continues to use it in current production models due to its reliability and precision cutting performance.
The updated idler pulley design improves belt tracking, reduces vibration, and increases durability under load. When paired with a new belt, this system restores factory blade synchronization and smooth deck operation.
📦 Included Components
| Qty | Component | Part Number | Function |
|---|---|---|---|
| 1 | Synchronous Drive Belt (Pix) | 120-3335 / P-1203335 | Maintains blade timing and synchronization |
| 1 | Idler Pulley (Genuine) | 161-4815 | Maintains belt tension and alignment |
🔧 Technical Overview
The synchronous belt system ensures both mower blades remain perfectly timed during operation. The idler pulleys maintain consistent belt tension and reduce stress on the drive system.
If either component wears, the system can lose synchronization, resulting in uneven cutting and increased vibration.
⚠️ Common Wear Symptoms
- Uneven or streaked cutting pattern
- Squealing or rattling from deck
- Belt slipping under load
- Visible pulley wobble or wear
- Loss of blade synchronization
🚜 Compatible Models
| Category / Deck Size | Compatible Models |
|---|---|
| 30in (76cm) TimeMaster Mowers | 20199, 20200, 21199, 21199HD, 21200 |
| 76cm TimeMaster Models | 20975, 20976, 20977, 20978, 21810 |
✔ Key Features
- ✔ Complete synchronous drive system solution
- ✔ Includes Pix belt + genuine Toro pulley
- ✔ Maintains precise blade synchronization
- ✔ Reduces vibration and operational noise
- ✔ Restores OEM cutting performance
📌 Notes
Toro introduced this belt system in 2012 and continues to use it in current production models. The updated pulley design improves durability and long-term performance.
We at Red Rock Turf are a stocking distributor for Briggs and Stratton, Kohler, Kawasaki and Toro. We don’t only sell their OEM parts we also use them on our equipment repairs and rebuilds. If there is something you need and don’t see it, then please feel free to get a hold of us, call or text 435-213-5854.
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